How to set a detail VC as .supplementary on .tripleColumn style

On a UISplitViewController initialised with a .doubleColumn, from the primaryVC you can change what's displayed on the secondary column with a simple showDetailViewController(vc, sender: self)

However, even changing the SplitVC to a triple column, this behaviour seems to be kept: meaning that it still pushes the passed VC to the .secondary column instead of the .supplementary

This seems pretty simple to achieve subclassing UISplitViewController and overriding showDetailViewController but I wanted to see if there's anything out of the box that would work like this

Thanks!
It should be "However, *when* changing the SplitVC to a triple column..."

Can't edit, so adding this here
How to set a detail VC as .supplementary on .tripleColumn style
 
 
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